[sane-devel] Problem with setting Fujitsu fi-4120c to Grayscale

[m. allan noah]

On Thu, 24 Apr 2003, Peter Chen wrote:

> I tried scanimage with --mode=gray, and it worked fine. But I could not do
> it with --duplex=both. It said:
> scanimage: sane_start: invalid argument. scanadf did not work either.

ok, sounds like a driver problem. the output from setting 
SANE_DEBUG_FUJITSU=128 would be helpful.

> 
> I'm using RedHat 7.2 with fi-4120c, and I feel it works fine with usb, at
> least now:).

you tell me in one sentence that it has errors, and in the next it works 
fine? i assume what you are trying to say is that you dont want to switch 
to scsi, just to test.

well, i can tell you, that on my 4120c, duplex gray scanning works just 
fine via scsi. so far, i cant get usb to run stably. it would be helpful 
if you tested on both connections.

allan

 When I tried to use sane-find-scanner under RedHat 7.1, it gave
> me a lot of 'minor errors', so I changed to RedHat 7.2.
> 
> I figured out that I have to use (void *) to pass to sane_control_option.
> Now I can setup grayscale and adf in my application.
> 
> Thanks a lot,
> ----- Original Message -----
> From: "m. allan noah" <anoah at pfeiffer.edu>
> To: "Peter Chen" <peterchenn at hotmail.com>
> Cc: "SANE Mailing List" <sane-devel at mostang.com>
> Sent: Thursday, April 24, 2003 5:33 PM
> Subject: Re: [sane-devel] Problem with setting Fujitsu fi-4120c to Grayscale
> 
> 
> > ok, in your prior mails it would have been helpful to explain the you were
> > writing an application, not just trying to use the scanner with the
> > existing frontends.
> >
> > can you set the grayscale and resolution without error using scanimage?
> > does it work every time? if not, then it is likely a driver problem, try
> > it with the scsi port as well. if there is a difference, then you might be
> > onto something.
> >
> > i have just plugged my 4120c into a usb port for the first time, and i
> > get device errors that lock scanadf hard. i should have some time to play
> > with it next week (finally). anything you come up with between now and
> > then, please mail the list, so that others can see.
> >
> > allan
> >
> > On Thu, 24 Apr 2003, Peter Chen wrote:
> >
> > > Hi all,
> > >
> > > I tried to set fi-4120c to Grayscale. I used the following code flow:
> > >
> > >         status = sane_init(version_code, NULL);
> > >         status = sane_get_devices(&device_list, true);
> > >         ...
> > >         sane_exit();
> > >
> > >         status = sane_init(version_code, NULL);
> > >         status = sane_open("dev/usb/scanner0", &device );
> > >         sane_control_option (device, 0, SANE_ACTION_GET_VALUE,
> > > &num_dev_options, 0);
> > >   for (i = 0; i < num_dev_options; ++i)
> > >     {
> > >       opt = sane_get_option_descriptor (device, i);
> > >       // Set the resolutions to 300 dpi
> > >       if ( strcmp(opt->name, SANE_NAME_SCAN_X_RESOLUTION) == 0)
> > >       {
> > >           value = 300;
> > >           sane_control_option (device, i, SANE_ACTION_SET_VALUE, &value,
> > > &info);
> > >       }
> > >       if ( strcmp(opt->name, SANE_NAME_SCAN_Y_RESOLUTION) == 0)
> > >       {
> > >           value = 300;
> > >           sane_control_option (device, i, SANE_ACTION_SET_VALUE, &value,
> > > &info);
> > >       }
> > >       // Set the scan mode to GrayScale
> > >       if ( strcmp(opt->name, SANE_NAME_SCAN_MODE) == 0)
> > >       {
> > >           value = 3;
> > >           sane_control_option (device, i, SANE_ACTION_SET_VALUE, &value,
> > > &info);
> > >       }
> > >     }
> > >
> > > The first time I ran it, it successfully set fi-4120c to GrayScale (when
> I
> > > debug, I could see that), but then later when I did that, it always
> returned
> > > SANE_STATUS_INVAL, even after I rebooted my linux box and fi-4120c. I
> could
> > > set the resolutions successfully. What did I do wrong?
> > >
> > > Thanks,
> > >
> > > Peter
> > > _______________________________________________
> > > Sane-devel mailing list
> > > Sane-devel at www.mostang.com
> > > http://www.mostang.com/mailman/listinfo/sane-devel
> > >
> >
> > --
> > "so don't tell us it can't be done, putting down what you don't know.
> > money isn't our god, integrity will free our souls" - Max Cavalera
> >
> >
> 

-- 
"so don't tell us it can't be done, putting down what you don't know.
money isn't our god, integrity will free our souls" - Max Cavalera